Last updated: September 26, 2026 · Originally published: June 6, 2026 · By Eternal Elixir Editorial
The first practical question with any NAD+ supplement is how much to take. For NMN dosage in Australia the short answer is 500mg once a day, which is what most local products give per serve and the daily maximum printed on the Australian pharmacy NMN labels we checked. This guide sets that figure against the human trials (250mg to 1,250mg a day), covers timing, food and how long to take it, and explains when a dose change makes sense and when it does not.
Short answer
- How much: 500mg of NMN once a day. Australian pharmacy NMN labels we checked set 500mg a day as the maximum.
- What trials used: 250mg to 900mg a day for 60 days to 12 weeks. In the largest dose trial, blood NAD and walking distance were highest at 600mg and 900mg, so 500mg sits a little below the peak.
- When: once a day, every day. Timing matters less than consistency.
- How long: the trials ran up to 12 weeks, and the pharmacy labels say 12 weeks or less. Talk to your doctor before taking it for longer.
Eternal Elixir makes NMN 500mg, so read our pick with that in mind. One capsule is one full 500mg serve.
What Is the Right NMN Dosage? (The Quick Answer)
For most healthy adults, 500mg once a day is the sensible NMN dose in Australia. Two things point there.
The first is the label. Pharmacy NMN products such as Melrose FutureLab NMN 500mg and JSHealth NMN 500 + Resveratrol state that the maximum daily dose must not exceed 500mg of NMN and that use should be 12 weeks or less. Bioglan NMN 500 and Microgenics NMN powder both give 500mg per serve, and so does our capsule.
The second is the research. The largest dose-comparison trial (Yi et al., GeroScience, 2023) gave 80 healthy adults aged 40 to 65 either placebo or 300mg, 600mg or 900mg of NMN once a day for 60 days. Blood NAD rose in every NMN group by day 30 and day 60, and six-minute walking distance improved more than with placebo. Both were highest at 600mg and 900mg, and the authors named 600mg as the dose where results peaked. No safety issues were found. Three of the authors worked for Abinopharm or ABA Chemicals.
So 500mg sits between the 300mg arm that already worked and the 600mg arm where results peaked. That is a reasonable dose, and it is a little below the best-performing arm. We would rather say that plainly. If you are new to the category, our complete NMN buyer’s guide for Australia covers the basics, and it is worth reading why NAD+ declines with age, because that decline is the reason people take NMN at all. Our page on whether one 500mg capsule is enough goes further into that exact dose.
NMN Dosage in Human Trials: 250mg to 1,250mg
Here is every daily dose we could match to a published human trial, with who took it and what happened. Use it to see where 500mg sits, not as a dosing chart.
| Daily dose | Trial | Who and how long | What was seen |
|---|---|---|---|
| 250mg | Igarashi 2022, npj Aging | 42 healthy men aged 65 and over, 12 weeks | Blood NAD rose; nominal gains in gait speed and grip that the authors said need larger studies |
| 250mg | Kim 2022, Nutrients | 108 older adults, morning or afternoon intake, 12 weeks | Afternoon group showed the largest gains in a sit-to-stand test and in drowsiness scores |
| 300mg | Yi 2023, GeroScience | 80 adults aged 40 to 65 across all arms, 60 days | Blood NAD and walking distance up against placebo |
| 500mg | No trial arm at exactly this dose | The usual Australian label serve | Sits between the 300mg and 600mg arms |
| 600mg | Yi 2023 | Same trial, 60 days | Highest NAD and walking results with 900mg; named the peak dose |
| 900mg | Yi 2023 | Same trial, 60 days | Similar to 600mg; well tolerated |
| 1,250mg | Fukamizu 2022, Scientific Reports | 31 healthy adults aged 20 to 65, up to 4 weeks | A safety study only: no changes beyond normal variation and no severe adverse events |
Two patterns stand out. More NMN raised blood NAD further, but the gains flattened above 600mg. And people respond very differently to the same dose. A follow-up analysis of the Yi trial (Kuerec et al., 2024) found the rise in blood NAD varied widely within each dose group, with a coefficient of variation from 29.2% to 113.3%. Two people on the same capsule can end up in very different places.
A meta-analysis published in Current Pharmaceutical Biotechnology (Wang et al., 2025) pooled 9 randomised trials with 412 middle-aged and older participants and found a small improvement in gait speed with NMN. The trials were small and varied in dose, so treat that as a hint rather than a settled result.
Add NMN 500mg to cart · $59.99How to Take NMN: Timing, Food and How Long For
What time of day should you take NMN?
Our label says one capsule a day, preferably in the morning, and most people take NMN with breakfast because it is easy to remember. The one trial that tested timing is worth knowing about, though. In Kim et al. (2022), 108 older adults took 250mg of NMN or placebo either in the morning or in the afternoon for 12 weeks. The afternoon NMN group showed the largest improvements in a sit-to-stand test and in drowsiness scores. It was a single trial in older Japanese adults, so it does not prove afternoon is better for everyone, but it does suggest that taking NMN later in the day is fine. Our guide to the best time of day to take NMN covers the trade-offs in more detail. Pick a time you will keep to, then keep to it.
With food or on an empty stomach?
Australian NMN labels differ here. Some say to take it with a meal and others do not mention food. Our label gives no food requirement. If you notice any stomach discomfort, taking your capsule with breakfast is a simple change to try.
Should you split the dose?
No need. The trials above all gave NMN once a day, and a single 500mg capsule is a complete serve. Splitting only matters if you take more than one serve, and at 500mg a day you are already at the label maximum.
How long until NMN works, and how long to take it?
Blood NAD was higher by day 30 in the Yi trial, and the 12-week trials saw changes in blood markers and some physical tests. A change in a blood marker is not the same as something you will feel, and many people notice nothing obvious. Our guide to how long NMN takes to work goes through the timelines trial by trial.
On duration, the published trials ran from 60 days to 12 weeks, and the pharmacy labels above say 12 weeks or less. Nobody has published multi-year human trial data. If you plan to take NMN for longer than 12 weeks, talk to your doctor first. Our review of what longer-term NMN research shows sets out what is and is not known.
NMN Dosage Safety: Side Effects and Who Should Be Careful
The published human data are reassuring over short periods. In Yi 2023, doses up to 900mg a day for 60 days showed no safety issues on adverse-event reports, blood tests or clinical checks. In Fukamizu 2022, 1,250mg a day for up to 4 weeks produced no changes beyond normal variation in 31 healthy adults. Those are small, short studies, and several were funded by NMN makers (Mitsubishi Corporation Life Sciences supplied the NMN and employed most of the Fukamizu authors).
Labels in Australia add their own cautions. Melrose FutureLab’s label says do not use if pregnant or likely to become pregnant, or during lactation. JSHealth’s says not suitable for children. Bioglan’s says adults only. Put simply: NMN is for adults, not for pregnancy or breastfeeding, and anyone taking prescription medicines or managing a health condition should talk to their doctor before starting.
There is no evidence that going above the label dose helps, and the Yi results flattened above 600mg. Starting at 500mg and staying there is the sensible default.
Choosing a Quality NMN Supplement in Australia
Your NMN dose only counts if you can read it clearly off the label. Four checks make that easy:
- Milligrams per capsule and capsules per serve. Some products hold 250mg per capsule and need two for a 500mg serve. JSHealth, for example, is 250mg of NMN per capsule, taken as two capsules. Ours is 500mg in one capsule.
- What else is in it. Melrose FutureLab adds 250mg of DMG to each 500mg NMN capsule, and JSHealth adds 75mg of resveratrol per capsule. That is fine if you want those extras, but compare the NMN amount alone.
- Bottle size. A 30-capsule bottle of 500mg capsules lasts a month. Our 90-capsule bottle lasts 90 days at one a day.
- Storage. Keep NMN sealed, cool and dry, away from a sunny windowsill or a hot car.
Eternal Elixir NMN 500mg is one 500mg capsule a day, 90 capsules to a bottle, $0.67 a day, shipped from Sydney. For a wider look at brands, see our roundup of the best NMN supplements in Australia, our Bioglan NMN review, and what is on the shelf in our guide to NMN at Chemist Warehouse. If you are still choosing between NAD+ precursors, see how NMN compares with NR.
Many people pair NMN with trans-resveratrol. Our Trans-Resveratrol gives 600mg per capsule, two capsules (1,200mg) a day with or without food, and our guide to NMN and resveratrol supplements explains the pairing. We also stock a third-party Vitasolutions NMN and resveratrol formula for people who want both in one capsule. Resveratrol labels warn it may affect some medicines, including warfarin, so check with your doctor if that applies to you. Our resveratrol dosage guide covers that side.
Do You Need TMG Alongside Your NMN Dose?
This comes up once people settle on a daily NMN dose. The reasoning goes like this: after NMN becomes NAD+ and that NAD+ is used, some of the leftover nicotinamide is cleared by adding a methyl group, so people add a methyl donor to their routine.
TMG (trimethylglycine, also called betaine) is one of those dietary methyl donors. A review by Obeid in Nutrients (2013) lists betaine alongside methionine, folate and choline as direct dietary sources of methyl groups, and notes that betaine supplements lower homocysteine after a methionine load. That research is about betaine, not NMN. No human trial has tested whether people taking NMN need TMG, so treat it as an optional addition rather than a requirement. Our explainer on why some longevity stacks pair NMN and TMG goes further.
If you do want to pair them, Eternal Elixir TMG gives 2,000mg in a three-capsule serve with a meal, at $44.99 for 90 capsules (30 serves, $1.50 a serve). It fits alongside your NMN 500mg capsule in the same routine.
NMN Dosage FAQ
What is the best NMN dosage for beginners?
500mg once a day. It is the usual Australian label serve and the daily maximum printed on the pharmacy labels we checked, it sits between the 300mg and 600mg arms of the main dose trial, and it is one of our capsules. There is no need to start lower and build up unless your doctor suggests it, because the trials started people straight on their full dose.
Is 1000mg of NMN too much?
It is twice the daily maximum printed on the pharmacy NMN labels we checked and twice our label serve. The only human data at or above that level is one 4-week safety study at 1,250mg in 31 healthy adults, which found no safety issues but did not test whether it works better. In the main dose trial, results flattened above 600mg. Stay with the label dose unless your doctor advises otherwise.
Should I take NMN every day or cycle it?
Take it every day while you are using it. The trials gave NMN daily, and blood NAD built up over the first month. The pharmacy labels we checked say to use NMN for 12 weeks or less, and the trials ran no longer than that, so a 12-week course followed by a check-in with your doctor is a sensible way to plan it.
Can you take NMN on an empty stomach?
Yes. Our label has no food requirement, only a preference for the morning. If you notice stomach discomfort, take it with breakfast instead.
Is it better to take NMN in the morning or at night?
Our label suggests the morning because it is easy to make a habit of. The one trial that compared timing found the afternoon group did a little better on leg-strength and drowsiness measures, so later in the day is also fine. Consistency matters more than the hour.
Add NMN 500mg to cart · $59.99
Should you take TMG every day?
If you choose to pair it with NMN, TMG is normally taken daily on the same rhythm, with a meal. Our TMG serve is three capsules (2,000mg). You also get betaine from foods such as beetroot, spinach, wheat germ and quinoa.
Can I take NMN with resveratrol?
Many people do, and JSHealth sells the two combined in one capsule. No trial has shown the pair works better than NMN alone. If you take warfarin or other prescription medicines, check with your doctor first, because resveratrol labels carry a medicines warning.
The Bottom Line on NMN Dosage
Take 500mg of NMN once a day, every day, and plan it in courses of up to 12 weeks. That matches the pharmacy labels we checked and sits just below the 600mg arm where the main trial saw its best results. More than the label dose adds cost without evidence of extra benefit. Eternal Elixir NMN 500mg gives that full dose in one capsule, 90 capsules to a bottle, for $0.67 a day. You can browse the rest of the Eternal Elixir range here.
Sources
- Yi L, Maier AB, Tao R, et al. The efficacy and safety of β-nicotinamide mononucleotide (NMN) supplementation in healthy middle-aged adults: a randomized, multicenter, double-blind, placebo-controlled, parallel-group, dose-dependent clinical trial. GeroScience. 2023;45(1):29-43. PubMed 36482258
- Kuerec AH, Wang W, Yi L, et al. Towards personalized nicotinamide mononucleotide (NMN) supplementation: nicotinamide adenine dinucleotide (NAD) concentration. Mechanisms of Ageing and Development. 2024;218:111917. PubMed 38430946
- Igarashi M, Nakagawa-Nagahama Y, Miura M, et al. Chronic nicotinamide mononucleotide supplementation elevates blood nicotinamide adenine dinucleotide levels and alters muscle function in healthy older men. npj Aging. 2022;8(1):5. PubMed 35927255
- Kim M, Seol J, Sato T, et al. Effect of 12-week intake of nicotinamide mononucleotide on sleep quality, fatigue, and physical performance in older Japanese adults: a randomized, double-blind placebo-controlled study. Nutrients. 2022;14(4):755. PubMed 35215405
- Fukamizu Y, Uchida Y, Shigekawa A, et al. Safety evaluation of β-nicotinamide mononucleotide oral administration in healthy adult men and women. Scientific Reports. 2022;12(1):14442. PubMed 36002548
- Wang JP, Wang L, Wang T, et al. Effects of nicotinamide mononucleotide supplementation on muscle and liver functions among the middle-aged and elderly: a systematic review and meta-analysis of randomized controlled trials. Current Pharmaceutical Biotechnology. 2025;26(13):2141-2152. PubMed 39185644
- Obeid R. The metabolic burden of methyl donor deficiency with focus on the betaine homocysteine methyltransferase pathway. Nutrients. 2013;5(9):3481-3495. PubMed 24022817
- Product pages read in September 2026: Melrose FutureLab NMN 500mg, JSHealth NMN 500 + Resveratrol, Bioglan NMN 500 and Microgenics NMN 500mg Powder at Chemist Warehouse.
- Eternal Elixir NMN 500mg, Trans-Resveratrol and TMG product pages and labels.
